Show test coverage in the gutter

[eth0net]

Check for existing issues

• Completed

Describe the feature

One thing I miss from other editors is the ability to show test coverage indicators in the gutter, in a similar way to git status indicators.

To differentiate the test coverage from git status they would need to be a different colour and/or displayed somewhere slightly differently, perhaps to the right of line numbers instead. For reference, JetBrains shows it on the right of the line numbers as well.

I would be interested in working on this as I would like to make more contributions, but I wanted to open this issue to track it and perhaps get some tips on where to look for the relevant git status indicator code.

If applicable, add mockups / screenshots to help present your vision of the feature

Git status in Zed

Git status in JetBrains

Coverage in JetBrains

[hhamud]

any updates on this?